System and method for monitoring fluid deficit

Abstract

A fluid management and medical device system may include a fluid management system and a medical device having one or more sensors proximate the distal end of the elongate shaft of the medical device. The controller of the fluid management system may be configured to calculate a fluid deficit when the distal end of the elongate shaft is disposed within a patient and configured to automatically pause fluid deficit calculation when the distal end of the elongate shaft is removed from the patient. In some instances the controller is configured to calculate the fluid deficit using rotational speed of the inflow pump in combination with a difference between a change in weight of a fluid supply source supplying fluid to the fluid management system and a change in weight of a collection container collecting fluid from the fluid management system.

What is claimed is: 
     
       1. A fluid management and medical device system, comprising:
 a medical device comprising:
 an elongate shaft configured to access a treatment site within a patient; 
 one or more sensors proximate a distal end of the elongate shaft; and 
 a handle coupled to a proximal end of the elongate shaft; and 
 
 a fluid management system comprising:
 an inflow pump configured to pump fluid from a fluid supply source to the treatment site; and 
 a controller configured to calculate a fluid deficit when the distal end of the elongate shaft is disposed within the patient; 
 
 wherein the controller is configured to automatically pause fluid deficit calculation when the distal end of the elongate shaft is removed from the patient. 
 
     
     
       2. The fluid management and medical device system of  claim 1 , wherein the controller is configured to resume the fluid deficit calculation when signals from the one or more sensors indicate the distal end of the elongate shaft is reinserted into the patient. 
     
     
       3. The fluid management and medical device system of  claim 1 , wherein the controller is configured to control the inflow pump to maintain a target fluid flow rate or a target fluid pressure based on a set of system operating parameters. 
     
     
       4. The fluid management and medical device system of  claim 1 , wherein the controller is configured to automatically reset the fluid deficit to zero after priming of the fluid management system. 
     
     
       5. The fluid management and medical device system of  claim 4 , wherein the controller is configured to automatically begin the fluid deficit calculation when signals from the one or more sensors indicate the distal end of the elongate shaft is inserted within the patient. 
     
     
       6. The fluid management and medical device system of  claim 1 , wherein the one or more sensors includes a temperature sensor. 
     
     
       7. The fluid management and medical device system of  claim 1 , wherein the one or more sensors includes a pressure sensor. 
     
     
       8. The fluid management and medical device system of  claim 1 , wherein the one or more sensors includes a temperature sensor and a pressure sensor. 
     
     
       9. The fluid management and medical device system of  claim 1 , wherein the fluid deficit calculation continues uninterrupted when the fluid supply source is replenished. 
     
     
       10. A fluid management and medical device system, comprising:
 a medical device comprising:
 an elongate shaft configured to access a treatment site within a patient; 
 one or more sensors proximate a distal end of the elongate shaft; and 
 a handle coupled to a proximal end of the elongate shaft; and 
 
 a fluid management system comprising:
 a fluid supply source operatively coupled to a supply load cell and in fluid communication with the elongate shaft; 
 a collection container operatively coupled to a collection load cell and in fluid communication with a collection drape; 
 an inflow pump configured to pump fluid from the fluid supply source to the treatment site; and 
 a controller configured to control the inflow pump to maintain a desired fluid pressure at the treatment site or a desired fluid flow rate based on a set of system operating parameters; 
 
 wherein the controller is in electronic communication with the supply load cell and the collection load cell; 
 wherein the controller is configured to calculate a fluid deficit using rotational speed of the inflow pump in combination with a difference between a change in weight of the fluid supply source and a change in weight of the collection container. 
 
     
     
       11. The fluid management and medical device system of  claim 10 , wherein the controller is configured to calculate the fluid deficit only when the distal end of the elongate shaft is disposed within the patient. 
     
     
       12. The fluid management and medical device system of  claim 11 , wherein the controller is configured to automatically pause fluid deficit calculation when the distal end of the elongate shaft is removed from the patient. 
     
     
       13. The fluid management and medical device system of  claim 10 , wherein the controller is configured to calculate a first fluid deficit value using a flow rate of the fluid and a second fluid deficit value using the difference between the change in weight of the fluid supply source and the change in weight of the collection container;
 wherein a displayable deficit value is based on a combination of the first fluid deficit value and the second fluid deficit value. 
 
     
     
       14. The fluid management and medical device system of  claim 13 , wherein the flow rate of the fluid is determined by the controller using the rotational speed of the inflow pump. 
     
     
       15. The fluid management and medical device system of  claim 13 , wherein the flow rate of the fluid is determined by the controller using data from a flow sensor disposed between the fluid supply source and the treatment site. 
     
     
       16. The fluid management and medical device system of  claim 13 , wherein the controller is configured to display the displayable deficit value if a difference between the first fluid deficit value and the second fluid deficit value is within a predetermined range;
 wherein the controller is configured to display a notification if the difference between the first fluid deficit value and the second fluid deficit value is outside of the predetermined range.